243807864 has 32 divisors (see below), whose sum is σ = 610621440. Its totient is φ = 81122400.

The previous prime is 243807857. The next prime is 243807913. The reversal of 243807864 is 468708342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4809 + ... + 22599.

It is an arithmetic number, because the mean of its divisors is an integer number (19081920).

Almost surely, 2^243807864 is an apocalyptic number.

243807864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

243807864 is an abundant number, since it is smaller than the sum of its proper divisors (366813576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243807864 is a wasteful number, since it uses less digits than its factorization.

243807864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18371 (or 18367 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 243807864 is about 15614.3480171283. The cubic root of 243807864 is about 624.7159148392.

The spelling of 243807864 in words is "two hundred forty-three million, eight hundred seven thousand, eight hundred sixty-four".